using UnityEngine;
using System;
using TMPro;
using Player.Wallet;  // 添加命名空间

public class GameDataManager : MonoBehaviour
{
    // 单例实例
    public static GameDataManager Instance { get; private set; }
    
    // 当前金币数量
    public int coins { get; private set; }
    // 金币变动事件（用于UI等监听）
    public Action onCoinsChanged;

    // 游戏场景中的金币文本引用
    [SerializeField] private TextMeshProUGUI gameSceneCoinsText; // 引用游戏场景中的金币文本

    /// <summary>
    /// 刷新金币数据，从PlayerWallet或PlayerPrefs读取，并更新UI
    /// </summary>
    public void RefreshCoins()
    {
        if (ComponentsManager.PlayerWallet != null)
        {
            coins = ComponentsManager.PlayerWallet.GetMoney;
            Debug.Log($"[GameDataManager] Refreshed coins from PlayerWallet: {coins}");
        }
        else
        {
            coins = PlayerPrefs.GetInt("_playerMoney", 0);
            Debug.Log($"[GameDataManager] Refreshed coins from PlayerPrefs: {coins}");
        }
        
        // 更新UI显示
        UpdateCoinsDisplay();
        
        // 通知其他监听者
        onCoinsChanged?.Invoke();
    }

    /// <summary>
    /// 脚本启用时加载金币数据
    /// </summary>
    private void OnEnable()
    {
        // 确保单例设置正确
       /* if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
            LoadCoins();
        }
        else if (Instance != this)
        {
            Debug.LogWarning("Multiple GameDataManager instances detected!");
            Destroy(gameObject);
        }*/
        if (Instance == this)
        {
            LoadCoins();
             Debug.Log("[GameDataManager] Reloaded coins on enable");
        }
    }

    /// <summary>
    /// 单例初始化，防止重复实例，加载金币数据
    /// </summary>
    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
            LoadCoins();
        }
        else
        {
            Destroy(gameObject);
        }
    }

    /// <summary>
    /// 应用暂停/恢复时保存或加载金币数据
    /// </summary>
    /// <param name="pause">是否暂停</param>
    private void OnApplicationPause(bool pause)
    {
         if (pause)
        {
            SaveCoins();
        }
        else
        {
            // 从后台恢复时重新加载数据
            LoadCoins();
        }
    }

    /// <summary>
    /// 应用退出时保存金币数据
    /// </summary>
    private void OnApplicationQuit()
    {
        SaveCoins();
    }

    /// <summary>
    /// 从PlayerWallet或PlayerPrefs加载金币数据
    /// </summary>
    private void LoadCoins()
    {
      if (ComponentsManager.PlayerWallet != null)
        {
            coins = ComponentsManager.PlayerWallet.GetMoney;
            Debug.Log($"[GameDataManager] Loaded coins from PlayerWallet: {coins}");
        }
        else
        {
            coins = PlayerPrefs.GetInt("_playerMoney", 0);
            Debug.Log($"[GameDataManager] Loaded coins from PlayerPrefs: {coins}");
        }
        
        // 更新显示
        UpdateCoinsDisplay();
        
        // 通知其他监听者
        onCoinsChanged?.Invoke();
    }

    /// <summary>
    /// 保存金币数据到PlayerPrefs
    /// </summary>
    public void SaveCoins()
    {
        if (ComponentsManager.PlayerWallet != null)
        {
            coins = ComponentsManager.PlayerWallet.GetMoney;
        }
        
        PlayerPrefs.SetInt("_playerMoney", coins);
        PlayerPrefs.Save();
        Debug.Log($"[GameDataManager] Saved coins: {coins}");
    }

    /// <summary>
    /// 启动时从PlayerPrefs加载金币数据并通知监听者
    /// </summary>
    private void Start()
    {
        // 从PlayerPrefs加载保存的金币数据
        if (ComponentsManager.PlayerWallet != null)
        {
            coins = ComponentsManager.PlayerWallet.GetMoney;
        }
        else
        {
            coins = PlayerPrefs.GetInt("_playerMoney", 0);
        }
        
        // 通知所有监听者更新显示
        onCoinsChanged?.Invoke();
    }

    /// <summary>
    /// 设置金币数量，并同步到PlayerWallet和PlayerPrefs
    /// </summary>
    /// <param name="amount">新金币数量</param>
    public void UpdateCoins(int amount)
    {
       int difference = amount - coins; // 计算差值
        coins = amount;
        
        // 同步到 PlayerWallet
        if (ComponentsManager.PlayerWallet != null)
        {
            if (difference > 0)
            {
                ComponentsManager.PlayerWallet.AddMoney(difference);
            }
            else if (difference < 0)
            {
                ComponentsManager.PlayerWallet.UseMoney(-difference); // 使用正数作为参数
            }
        }
        
        // 保存到 PlayerPrefs
        SaveCoins();
        
        // 通知更新
        onCoinsChanged?.Invoke();
    }

    /// <summary>
    /// 刷新金币UI显示
    /// </summary>
    private void UpdateCoinsDisplay()
    {
        if (gameSceneCoinsText != null)
        {
            gameSceneCoinsText.text = $"{coins}";
            Debug.Log($"[GameDataManager] Updated coins display: {coins}");
        }
    }

    /// <summary>
    /// 增加金币，并同步到PlayerWallet和PlayerPrefs
    /// </summary>
    /// <param name="amount">增加的金币数量</param>
    public void AddCoins(int amount)
    {
        int oldCoins = coins;
        coins += amount;
        
        Debug.Log($"Adding coins: {amount}, Old: {oldCoins}, New: {coins}");
        
        if (ComponentsManager.PlayerWallet != null)
        {
            ComponentsManager.PlayerWallet.AddMoney(amount);
            Debug.Log($"PlayerWallet updated, new balance: {ComponentsManager.PlayerWallet.GetMoney}");
        }
        
        SaveCoins();
        onCoinsChanged?.Invoke();
    }

    /// <summary>
    /// 设置游戏场景中的金币文本引用，并立即刷新显示
    /// </summary>
    /// <param name="coinsText">金币文本组件</param>
    public void SetGameSceneCoinsText(TextMeshProUGUI coinsText)
    {
        gameSceneCoinsText = coinsText;
        // 立即更新显示
        if (gameSceneCoinsText != null)
        {
            gameSceneCoinsText.text = $"{coins}";
        }
    }
}